His results were first published on The Abstract, the NC State University research blog. The complete set of Josh Katz's maps, updated with the results from over 350,000 new survey responses, are compiled in the new book "Speaking American," publishing October 25 from Houghton Mifflin Harcourt.

Katz gave us permission to publish some of the coolest maps from his collection.

Residents of the far north have an oddly Canadian way of pronouncing "been"

For whatever reason, it's a "boo-wie" knife in Texas and D.C.*

UPDATE: Enthusiastic Marylanders have alerted us that there is indeed a town named "Bowie, Md." that is pronounced "Boo-wie." That solves that. No word yet from Texans.

UPDATE 2: From a Texan: "It's pronounced Boo-wie because it's named after Jim Bowie (pronounced Boo-wie), who played a major role in the Texas revolution. That explains why we're the only ones who pronounce it correctly."